Nonlinear Modeling of Eddy-Current Couplers

Calculation features of magnetic coupling in non-magnetic structures

“…In them, the magnetic field is created by permanent magnets (NdFeB and SmCo) installed in the leading and driven couplings. A lot of work has been devoted to the calculation of magnetic couplings, for example, [1][2][3][4][5][6][7], where constructions with steel magnetic cores are considered. In [1,2], the influence of the permanent magnets geometry on the coupling characteristics is investigated.…”

“…Therefore, a technique is required that makes it possible to quickly calculate the magnetic coupling maximum torque for several design variants. Such method is based on the construction and calculation of circuits for the replacement of magnetic circuits [7,10].…”

Analytical Solution of Magnetic Field in Permanent-Magnet Eddy-Current Couplings by Considering the Effects of Slots and Iron-Core Protrusions

“…The study of the magnetic field in PM devices can be achieved in two ways: numerical methods [1,2] and analytical methods [3][4][5][6][7][8][9][10][11][12]. Numerical methods such as the finite element (FE) method can yield accurate predictions of the performance of a device by considering the real geometry and nonlinear material properties, but the FE method is time-consuming because accurate results require a refined mesh of the model, which may limit its application to design optimization.…”

“…However, this method is not applicable to the slotted model due to the slots and iron-core protrusions, which lead to discontinuity in the conductor layer. Another method that has been used recently is the magnetic equivalent circuit (MEC) method [8]. Complex geometry and nonlinear material properties can be considered with the MEC method, whereas they are normally simplified or ignored in analytical models.…”

Investigation of the effect of winding distribution and slot opening on performance of an axial flux hysteresis motor

“…In recent years, many papers have analyzed the common radial and axial flux hysteresis motors based on numerical methods, such as the [mite element method (FEM) and the Preisach models [7]- [11], or analytical methods [12]- [14]. One of the useful methods in performance analysis of the hysteresis motors is Finite Element Method (FEM) which is allows a precise analysis of magnetic devices taking into account geometric details and magnetic nonlinearity [2], [15], [16]. In this paper the effect of winding distribution and slot opening on performance of a single side axial flux hysteresis motor (SSAFHM) is investigated.…”